|
|
|
|
|
| Guimaraens,Mariana Alves de; Macedo,Silvio José de; Oliveira-Carvalho,Maria de Fátima de; Burgos,Douglas Correia; Pereira,Sonia Maria Barreto. |
| The diversity of algal banks composed of species out the genera Gracilaria Greville and Hypnea J.V. Lamouroux have been impacted by commercial exploitation and coastal eutrophication. The present study sought to construct dynamic models based on algal physiology to simulate seasonal variations in the biomasses of Gracilaria and Hypnea an intertidal reef at Piedade Beach in Jaboatão dos Guararapes, Pernambuco State, Brazil. Five 20 × 20 cm plots in a reef pool on a midlittoral reef platform were randomly sampled during April, June, August, October, and December/2009 and in January and March/2010. Water temperature, pH, irradiance, oxygen and salinity levels as well as the concentrations of ammonia, nitrate and phosphate were measured at the sampling site.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Algal biomass; Eutrophication; Sandstone reefs; Trophic models. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042012000400010 |
| |
|
|
| Monteiro,José Juarez Ferreira; Leça,Enide Eskinazi; Koening,Maria Luise; Macedo,Silvio José de. |
| This study reports the first occurrence of Trichodesmiumthiebautii Gomont ex Gomont on the coast of northeastern Brazil. Samples were gathered during the rainy season (July 2005) and the dry season (November 2006) at six stations distributed along two perpendicular profiles of the coast of Pernambuco (8º18'S - 34º56'W and 8º32'S - 35º00'W). T. thiebautii was found during both periods of the year and at the six collection stations, forming colonies in the form of clusters or more rarely, bundles, with straight cylindrical trichomes, quadratic or slightly longer cells, with widths between 5-10 µm and heights of 3-15 µm. The hydrological variables presented small variations, contributing to wide distribution of the species. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Taxonomic characters; Annual variation; Spatial variation; Pernambuco. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062010000400027 |
| |
|
|
|
